The Municipality of Kiamba is located at western Section of the Province of Sarangani. It is a coastal town located at the north of Celebes Sea. It is positioned at 05 degrees 59 min. north and longitude 124 degrees 37 east. It has 38 kilometers stretch of regular coastline. It is bounded by the north by the Municipality of T’boli with thick and unspoiled mountain ranges heavy with vegetation; on the south by the Celebes Sea; on the east by the Municipality of Maasim with Taluk River serving as the natural boundary; and on the west by the Municipality of Maitum bounded with Pangi River.
Land Area by Barangay
The total land area of the Municipality of Kiamba is 41,828 hectares which is 1.32% and 5.6% of the entire land area of region XI and Sarangani, respectively. Out the nineteen barangays, Lomuyon possesses the biggest land area with 5,360 hectares or 12.82% of the total land area, secondly barangay Datu Dani has 4,259 hectares or 10.16% of the total land area and barangay Katubao has 4,000 hectares or 9.56% of the total land area. In contrast, barangay Lagundi possesses the smallest in terms of land area with 287 hectares or 0.69% of the total land area.
Municipal land is classified as follows: 26.26% or 10,985 hectares are Alienable and Disposable land while 73.74% or 30.843 hectares are classified as Forest.
Thirty point thirty one or 12,982 hectares of the municipal land area is classified under under 0-18% slope, 27.31% or 11,424 hectares under 18-30% which comprise the biggest potion, 20.31 percent or 8,496 hectares falls under 30-50% slope and 21.46 percent or 8,976 hectares is classified under 50% and above.
Climate/Rainfall/Prevailing Wind Direction
For the years 2006-2010, 2006 experienced the highest number of rainfall with a cumulative monthly average of 2,333.9 cms. The month of October generated the most rainfall in 2006,
Rainfall in Municipality of Kiamba is evenly distributed throughout the year. However, the rainiest month in 2007 was registered in the months of January, March, May, June, July, October and November data. The rest of the months have less rainfall. In the year 2010, the rainiest months are January, March, April, June, August, and December with an average rainfall of 639.3 monthly. Kiamba has invigorating type of climate caused by gentle wind from the sea during the day and cool mountain breeze at night.
Basic Soil Type
Fifty six point ninety eight percent or 24,406 hectares of the municipal land area is under 0-30% slope San Miguel Sity Clay Loam which comprise the biggest portion, 20.31 percent or 8,496 hectares falls under 30-50% slope and 21.46 percent or 8,976 hectares is classified under 50% and above.
Hydrology (HYDROLOGIC MAP) or Geologic Map
The municipality of Kiamba is blessed with the presence of eight (8) major rivers and creeks that cut across the narrow plains. On the eastern side are the Taluk River, Maglangit and Kitagas creeks. From Barangay Lomuyon creek, Kiblis creek, Maligang river, and Kling river. Seven kilometer in the east of poblacion is the Tambilil river, the most hazardous of them all. In western section closed to Poblacion, are Tual river, Badtasan river and Nalus river where water overflows when there is heavy rainfall. The last is Pangi river which irrigate the rice fields of Tablao, Luma and Lebe and Salakit. Besides this creeks and rivers are numerous springs with their crystal clear water streaming down to the sea.
Flood Prone Areas/Erosion Map
According to the Bureau of Soils, about 75% or 31,371 hectares of the total land area of Kiamba is slightly eroded and 25 percent or 10,457 hectares is severely eroded.
The municipality of Kiamba has 31,371 hectares area not flood prone which is 75% of the total land area, areas that are not flood prone in the municipality of are the mountainous areas, in the remaining 25% or 10,457 is occasionally flooded, it also affect all the barangay except the barangay of Maligang and Gasi.
Land suitability and the Municipality of Kiamba are classified into categories best on the degree of limitation to which the environmental requirement or the physical characteristic of land can satisfactorily produce crops without its deterioration.
Based on the Land Management Unit description, there are four categories identified as follows: SR-suitable for irrigated rice and fishponds, Scc-suitable for cultivated annual crops, STV- suitable for perennial tree and vine crops and NS- not suitable for any of the above land uses.
1. Soil Suitable for Irrigated Rice or Fishpond- The land suitability map of the municipality indicates that the total potential area suitable for this purposes is 35.08 square kilometers or 3,508,00 hectares. It has soil type identified as San Miguel Silty Clay Loam with Slopes ranging from 0-8% mostly found in the barangays of Luma, Lebe, Salakit, Nalus, Badtasan, part of Poblacion, Suli, Tambilil, Datu-Dani, part of Lagundi, Kling and Kayupo and undifferentiated clay loam with slopes ranging from 0-8% almost found in all barangays. These areas serve with irrigation facilities and other infrastructure support facilities. Other rice farm depends on rainwater.
2. Soil Suitable for Cultivated Annual Crops – Potential area for this use is 28.84 square kilometers or 2,884.00 hectares. Soil type in this area is San Miguel Silty Clay Loam and undifferentiated Silty Clay Loam situated almost all the barangays. Most are planted to Corn, Vegetable, pineapple and other annual and semi-annual crops.
3. Soil Suitable for Perennial Tree and Vine Crops- Total land area in this category is 81.88 square kilometers or 8,188.00 hectares. These are planted to rubber, mango and other fruit trees. These are found largely in the barrages of Kling, Gasi and Tambilil. It has soil type of San Miguel Salty Clay Loam and Undifferentiated Salty Clay Loam.
4. Soil not Suitable in any of the above land use categorized as forest, open grassland, swamps/marshland and etc with a total land area of 272.49 square kilometers or 27,249.00 hectares.